CN102721154B - Energy-saving control device and control method for variable displacement compressor of air conditioner - Google Patents
Energy-saving control device and control method for variable displacement compressor of air conditioner Download PDFInfo
- Publication number
- CN102721154B CN102721154B CN201210217458.3A CN201210217458A CN102721154B CN 102721154 B CN102721154 B CN 102721154B CN 201210217458 A CN201210217458 A CN 201210217458A CN 102721154 B CN102721154 B CN 102721154B
- Authority
- CN
- China
- Prior art keywords
- offset
- temperature
- value
- desired value
- temperature difference
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention relates to an energy-saving control device for a variable displacement compressor of an air conditioner. The energy-saving control device comprises an inside temperature control module, an outlet air temperature control module and a compressor control module, wherein the outlet air temperature control module comprises a base value computing unit which is used for acquiring a target value which is less than a target outlet air temperature according to the target outlet air temperature and the outside temperature, a dynamic value computing unit which is used for determining a first compensation value according to the temperature difference of the air-conditioner set temperature and the inside temperature, and a target evaporator temperature computing unit which is used for summing the target value and the first compensation value so as to acquire a target evaporator temperature which is close to the target outlet air temperature. By the energy-saving control device for the variable displacement compressor of the air conditioner, the adjustability of an external control variable displacement compressor is used fully, influence of the environment inside and outside an automobile on a refrigeration system is taken into account, and the target evaporator temperature can be adjusted in real time according to the current refrigeration needs inside the automobile, so that excellent energy-saving property of an automotive air conditioning system is ensured.
Description
Technical field
The present invention relates to the control of the variable compressor of air-conditioning, particularly relate to energy-saving control device and the control method of the outer control variable displacement compressor of on-board air conditioner.
Background technology
Along with the fast development of auto industry, the requirement of people to air conditioning for automobiles performance and comfortableness thereof constantly promotes.Existing dependent formula fixed displacement compressor truck air-conditioning system has been difficult to meet user's requirement.On the one hand, when vehicle interior temperature fluctuation is larger, the irreversible loss produced because of the frequent start-stop of dependent formula fixed displacement compressor truck air-conditioning system makes system energy consumption increase to some extent; On the other hand, the work of fixed displacement compressor cycle clutch to automobile engine causes severe jamming.In order to solve the problem, meet the requirement of air conditioning for automobiles load, variable compressor arises at the historic moment.
External control variable displacement compressor has the features such as no-clutch suction is put, lightweight, and the cornering ability of automobile is improved more, it is more that optimized displacement control also makes fuel consumption reduce.The energy saving of external control variable displacement compressor is mainly undertaken initiatively controlling accurately realizing by air conditioning control device, and compared with traditional compressor, variable compressor has very large advantage at the stability of a system, economy and energy-saving square mask.
The control device of existing outer control variable displacement compressor only considered the impact of environment on refrigeration system when controlling it, thus target evaporator temperature is fixed on certain fixed value, the energy conservation characteristic of outer control variable displacement compressor is difficult to bring into play.
Summary of the invention
Based on this, be necessary energy-saving control device and control method that a kind of variable displacement compressor of air conditioner according to the real-time adjustment aim evaporator temperature of refrigeration demand in current vehicle is provided.
An energy-saving control device for variable displacement compressor of air conditioner, it comprises interior temperature control module, leaving air temp control module and compressor control module.Described interior temperature control module is at least according to the target leaving air temp of air-conditioning design temperature and the inside and outside temperature computation air-conditioning of car.Described leaving air temp control module comprises: basic value computing unit, and it obtains according to described target leaving air temp and the outer temperature of car the desired value that is less than described target leaving air temp; Dynamic value computing unit, it determines the first offset according to the temperature difference of air-conditioning design temperature and vehicle interior temperature; There is defined the first default temperature difference and second being respectively positive number and negative and preset the temperature difference, when the described temperature difference is greater than the first default temperature difference or is less than the second default temperature difference, the predesigned compensation value that first offset maintains a positive number or negative is respectively constant, when the described temperature difference from second preset the temperature difference be elevated to gradually first preset the temperature difference time, the first offset linearly increases to described positive predesigned compensation value from the predesigned compensation value of described negative along with the increase of the temperature difference; And target evaporator temperature computing unit, it is sued for peace to described desired value and the first offset to obtain the target evaporator temperature close to described target leaving air temp.Described compressor control module controls described variable compressor according to described target evaporator temperature.
In a preferred embodiment, described basic value computing unit obtains first object value according to the outer temperature of car, and obtains the second desired value according to described target leaving air temp.Described first object value, along with the rising of the outer temperature of car, changes in trapezoidal shape substantially.Described second desired value is the difference of target leaving air temp and the first adjusted value; Described desired value is the smaller value in first object value and the second desired value.
In a preferred embodiment, described dynamic value computing unit also determines the second offset according to current sunlight strength.When sunlight strength is less than the second preset value, described second offset increases along with the increase of sunlight strength, and when described sunlight strength is more than or equal to the second preset value, described second offset is substantially constant.Described target evaporator temperature be described desired value, the first offset and the second offset and.
In a preferred embodiment, described leaving air temp control module also comprises antifog Risk Calculation module, described antifog Risk Calculation unit is used for determining the 3rd offset according to wiper signal, and when windscreen wiper signal is for leaving, the 3rd offset is a changeless negative.Described target evaporator temperature be described desired value, the first offset, the second offset and the 3rd offset and.
In a preferred embodiment, described antifog Risk Calculation unit is also for determining knot nebelwind danger according to the output signal of car humidity or antifog sensor, thus determine the 4th offset further, when tying nebelwind danger and being greater than default risk, export a changeless negative as the 4th offset.When tying nebelwind danger and being less than default risk, the 4th offset reduces along with the increase of knot nebelwind danger.Described target evaporator temperature be described desired value, the first offset, the second offset, the 3rd offset and the 4th offset and.
Present invention also offers a kind of control method of variable displacement compressor of air conditioner, described control method comprises: current as optional defrosting mode when judging, and when the outer temperature sensor of car is normal, performs following steps:
The desired value of target leaving air temp is less than according to target leaving air temp and the outer temperature computation one of car;
The temperature difference according to air-conditioning design temperature and vehicle interior temperature determines the first offset; There is defined the first default temperature difference and second being respectively positive number and negative and preset the temperature difference, when the described temperature difference is greater than the first default temperature difference or is less than the second default temperature difference, the predesigned compensation value that first offset maintains a positive number or negative is respectively constant, when the described temperature difference from second preset the temperature difference be elevated to gradually first preset the temperature difference time, the first offset linearly increases to described positive predesigned compensation value from the predesigned compensation value of described negative along with the increase of the temperature difference;
Described desired value and the first offset are sued for peace to obtain the target evaporator temperature close to described target leaving air temp; And
According to described target evaporator temperature, described variable compressor is controlled, reach target evaporator temperature reposefully as early as possible to make the temperature of evaporimeter.
In a preferred embodiment, the method calculating described desired value is: obtain first object value according to the outer temperature of car, and obtain the second desired value according to described target leaving air temp.Described first object value, along with the rising of the outer temperature of car, changes in trapezoidal shape substantially; Described second desired value is the difference of target leaving air temp and the first adjusted value; Described desired value is the smaller value in first object value and the second desired value.
In a preferred embodiment, described control method comprises step further: when sunlight strength sensor is normal, calculate the second offset according to sunlight strength, and described target evaporator temperature is desired value, the first and second offset sums; When sunlight strength is less than the second preset value, described second offset increases along with the increase of sunlight strength, and when described sunlight strength is more than or equal to the second preset value, described second offset is substantially constant.Described target evaporator temperature be described desired value, the first offset and the second offset and; When sunlight strength sensor is abnormal, if sunlight strength is the first preset strength, and calculate described second offset by the first preset strength.
In a preferred embodiment, described control method comprises the step determining the 3rd offset according to wiper signal further: when windscreen wiper signal is for leaving, and the 3rd offset is a changeless negative.Described target evaporator temperature be described desired value, the first offset, the second offset and the 3rd offset and.
In a preferred embodiment, described control method comprises further to be determined to tie nebelwind danger according to the output signal of car humidity or antifog sensor and determines the step of the 4th offset according to knot nebelwind danger, when tying nebelwind danger and being greater than default risk, export a changeless negative as the 4th offset.When tying nebelwind danger and being less than default risk, the 4th offset reduces along with the increase of knot nebelwind danger.Described target evaporator temperature be described desired value, the first offset, the second offset, the 3rd offset and the 4th offset and.
The energy-saving control device of variable displacement compressor of air conditioner of the present invention makes full use of external control variable displacement compressor adjustable features, not only consider the impact of car internal and external environment on refrigeration system, also according to the real-time adjustment aim evaporator temperature of refrigeration demand in current vehicle, farthest ensure that the energy saving of automotive air-conditioning system.
Accompanying drawing explanation
Fig. 1 is the structural principle block diagram of the energy-saving control device of the variable displacement compressor of air conditioner of an embodiment.
Fig. 2 is the structural principle block diagram of the leaving air temp control module of an embodiment.
Fig. 3 is the Dynamic calculation method figure of the basic value computing unit of an embodiment.
Fig. 4 is the Dynamic calculation method figure of the dynamic value computing unit of an embodiment.
Fig. 5 is the Dynamic calculation method figure of the antifog Risk Calculation unit of an embodiment.
Fig. 6 is the control method flow chart of the leaving air temp control module of an embodiment.
Fig. 7 is the controlling party block diagram of the variable compressor of an embodiment.
Fig. 8 is the refrigerant pressure of an embodiment and the corresponding relation figure of compressor operating electric current.
Fig. 9 is the evaporator temperature of an embodiment and the corresponding relation figure of compressor operating electric current.
Figure 10 is the control method flow chart of the compressor control module of an embodiment.
Detailed description of the invention
Below in conjunction with specific embodiment and accompanying drawing, the energy-saving control device of variable displacement compressor of air conditioner of the present invention and control method are described in further detail.
The energy-saving control device of variable displacement compressor of air conditioner of the present invention is used for controlling the variable compressor (hereinafter referred to as compressor) of automotive air-conditioning system.Automotive air-conditioning system mainly comprises condenser, expansion valve, evaporimeter and compressor.Refrigerant compression is become high pressure saturated gas (ammonia or fluorine Lyons) by compressor, and this gaseous refrigerant is again through condenser condenses.After expansion valve (throttling arrangement) throttling, cold-producing medium enters into evaporimeter, by Air flow heat exchange.Such as be connected in car crust by evaporimeter, the coil in evaporimeter will carry out heat exchange with air in car, then be blowed to by cold air by air blast in the middle of the air in car.Become low-pressure steam after refrigerant heat exchanger in evaporimeter coil and get back to compressor, then by compressor compresses, recycle like this and just complete refrigeration system.
The functional block diagram of the energy-saving control device of variable displacement compressor of air conditioner of the present invention as shown in Figure 1.The energy-saving control device of this variable displacement compressor of air conditioner mainly comprises interior temperature control module, leaving air temp control module and compressor control module.Wherein, leaving air temp control module and compressor control module determine adopt outer control variable displacement compressor the energy saving that can bring to air conditioning for automobiles.
Interior temperature control module is substantially identical with the interior temperature control module of existing air-conditioner controller, be mainly used in the target leaving air temp that the operation according to air-conditioning design temperature, car internal and external temperature, user, vehicle-state (the such as speed of a motor vehicle, the cold and hot starting state of car load etc.), sunlight strength etc. calculate air-conditioning.Understandable, when calculating target leaving air temp, the parameter of reference can adjust to some extent, such as, not with reference to sunlight strength.
One of major function of leaving air temp control module is for calculating a target evaporator temperature close with target leaving air temp according to parameters such as target leaving air temp, car internal and external temperatures.Concrete, ensure that evaporator temperature is less than in the scope of a certain value of target leaving air temp.This target evaporator temperature changes along with the change of car internal and external environment, thus can maximum lift energy saving.The setting of target evaporator temperature directly affects energy saving and the security of air conditioning for automobiles.Energy saving is mainly reflected in evaporator temperature the closer to target leaving air temp, then the required discharge capacity exported of compressor is lower, more energy-conservation.Security then represents the performance of automotive air-conditioning controller on auto-antifog, in season in spring and autumn and under the larger operating mode of humidity, if excessively emphasize that energy saving can cause sacrificing the dehumidification function of air conditioning for automobiles, and then have impact on the performance of automatic air conditioning controller in security.
Concrete, as shown in Figure 2, leaving air temp control module have employed basic value computing unit, dynamic value computing unit, antifog Risk Calculation unit and target evaporator temperature computing unit when calculating target evaporator temperature.
Basic value computing unit is used for obtaining a desired value according to the outer temperature (temperature sensor obtains from car) of car and target leaving air temp.Wherein, first obtain first object value according to the outer temperature of car, first object value, along with the rising of the outer temperature of car, changes in trapezoidal shape substantially, concrete, as shown in Figure 3.When the outer temperature of car is less than or equal to t1(such as 10 DEG C) time, it is constant that first object value maintains temperature t5 substantially.When the outer temperature of car is elevated to t2(such as 15 DEG C gradually from t1) time, first object value is substantially linearly elevated to t6 from t5.When the outer temperature of car is more than or equal to t2 and is less than or equal to t3(such as 25 DEG C) time, it is constant that first object value maintains temperature t6 substantially.When the outer temperature of car is elevated to t4(such as 30 DEG C gradually from t3) time, first object value is substantially linearly reduced to t5 from t6, also namely: first object value cardinal principle is trapezoidal shape change with the rising of the outer temperature of car.Then, obtain the second desired value according to target leaving air temp, the second desired value is target leaving air temp and the first adjusted value t61(such as 3 DEG C) difference.Finally, smaller value in first object value and the second desired value is chosen as final goal value.Wherein, the general value of temperature t6 about 12 ~ 15 DEG C, and can determine according to customer demand, be configurable value.
Dynamic value computing unit is used for determining the first offset according to the temperature difference of air-conditioning design temperature and vehicle interior temperature, and determine the second offset according to current sunlight strength, thus obtain current setting and stablize the change for refrigeration load under affecting with the vehicle interior temperature temperature difference and sunlight, its dynamic calculation figure is as shown in Figure 4.When the temperature difference be greater than respectively first preset temperature difference t7(such as 6 DEG C), be less than second preset temperature difference t71(t71 be negative) time, first offset maintains t8(such as 5 DEG C substantially) and t81(t81 be negative) constant, when the temperature difference is elevated to the first default temperature difference t7 gradually from the second default temperature difference t71, first offset increases along with the increase of the temperature difference, and proportional with the temperature difference, be elevated to t8 from t81.When sunlight strength is less than the first preset strength S1(such as 500W/m
2) time, the second offset increases to t9 along with the increase of sunlight strength.When sunlight strength is more than or equal to the first preset strength S1, then making the second offset substantially maintain t9 constant is also that degree of compensation maintains the highest.Dynamic value computing unit by output first offset and the second offset and.In other embodiment, the impact of sunlight strength on target evaporator temperature can be omitted, also namely need not calculate the second offset.
Basic value computing unit and dynamic value computing unit can meet the target of the Energy Saving Control of variable compressor, and antifog Risk Calculation unit will be used for the auto-antifog performance promoting energy-saving control device, guarantees the security of air conditioning for automobiles.
Antifog Risk Calculation unit is used for determining the 3rd offset according to wiper signal, and determines the 4th offset according to the output signal of car humidity or antifog sensor.Wherein windscreen wiper signal is used for judging current vehicle external environment further.Car humidity sensor and antifog sensor both middle apolegamy one general, for judging for the risk tying mist in car, thus adjustment aim evaporator temperature values.In the present embodiment, as shown in Figure 5, when windscreen wiper signal is for leaving time (On, i.e. automobile starting wiper), export the 3rd offset t10, wherein t10 is negative.Antifog Risk Calculation unit determines knot nebelwind danger according to the output signal of car humidity or antifog sensor, understandable, need to consider car internal and external temperature when calculating knot nebelwind danger, this value-at-risk draws by a large amount of tests, knot nebelwind danger can be defined as the variable of 0 to 100%.When tying nebelwind danger and being greater than default risk h1, exporting the 4th offset t11, t11 is negative; When tying nebelwind danger and being less than default risk, the 4th offset reduces along with the increase of knot nebelwind danger.Antifog Risk Calculation unit by output third and fourth offset and.
Target evaporator temperature computing unit is used for the summation of desired value, the first offset, the second offset, the 3rd offset and the 4th offset to obtain the target evaporator temperature close to target leaving air temp.
Describe the method that leaving air temp control module obtains target evaporator temperature above in detail, will introduce the control method of leaving air temp control module in detail below, as shown in Figure 6, this control method comprises the steps.
Step S101, judges whether current be force defrosting mode (if user presses defrost button, then current for forcing defrosting mode), if it is performs step S111, otherwise perform step S102.
According to the output of the outer temperature sensor of car, step S102, judges that whether the outer temperature sensor of car is normal, performs step S103, otherwise perform step S111 if normal.The abnormal situation of car outer sensor may comprise short circuit or open circuit, or exceeds range of normal value, as being less than-50 degree, or is greater than 60 degree.
Step S103, utilizes basic value computing unit to calculate a desired value.
According to the output of sunlight strength sensor, step S104, judges that whether sunlight strength sensor is normal, performs step S106, if judge sunlight strength sensor experiences failure, perform step S105 if normal.
Step S105, arranging sunlight strength is the first preset strength S1, and the first preset strength S1 is replaced current sunlight strength exports to dynamic value computing unit, performs step S106.
Step S106, utilizes dynamic value computing unit to calculate the first offset and the second offset sum.
Step S107, judges currently whether be equiped with antifog sensor or car humidity sensor, if had, performs step S109, otherwise performs step S108.
Step S108, setting the 4th offset is 0, then exports to antifog Risk Calculation unit, performs step S109.
Step S109, utilizes antifog Risk Calculation unit to calculate the third and fourth offset, exports after summation.
Step S110, utilizes target evaporator temperature computing unit to the summation of desired value, the first offset, the second offset, the 3rd offset and the 4th offset to obtain the target evaporator temperature close to target leaving air temp.
Step S111, setting target evaporator temperature is predetermined value t12, and wherein t12 is a very little fixed value, can reach the function of forcing defrosting at such a temperature.
In above-mentioned control method, the front and back execution sequence between step S102-S103, step S104-S106, step S107-S109 tri-groups can be chosen and change.
Compressor control module is mainly used in accurately controlling according to the electric current of the electrically-controlled valve of the Parameters on Compressive machines such as target evaporator temperature and current evaporator temperature, refrigeration system exhaust pressure, engine speed, thus reach accurately control compressor slanting plate angle, and then control the object of compressor displacement, make the refrigeration of air-conditioning system reach the pre-after date of user as early as possible and settle out.The control effects of fast and stable can not only make vehicle interior temperature reach temperature desired by user sooner, reduce the fluctuation of the car inner ring mould be in course of adjustment, and because stable control can make whole refrigeration system reduce the wasted energy that is in course of adjustment, improve energy saving.In addition, due to stable control, make target evaporator temperature more easily near the refrigeration demand needed for reality, thus demand more energy-conservation under comfortable prerequisite can be met.
Fig. 7 shows the controlling party block diagram of variable compressor in one embodiment of the invention, and wherein, compressor control module mainly comprises moment of torsion and rotation speed of the fan calculates unit, overvoltage/low-voltage power-off unit, evaporator temperature control unit and exports restriction unit.
Moment of torsion and rotation speed of the fan calculate unit and obtain refrigerant pressure from refrigerant high pressure detecting unit, compressor rotary speed (i.e. engine speed) is obtained from other unit, rotation speed of the fan and compressor torque demand is calculated according to refrigerant pressure and compressor rotary speed, and send rotation speed of the fan and compressor torque demand to automobile bus, such as CAN.Car engine control unit can carry out the distribution of moment of torsion according to compressor torque demand.Refrigerant high pressure detecting unit is arranged between condenser and expansion valve.
Overvoltage/low-voltage power-off unit limits unit with output and is connected, and limits unit output overvoltage or low-voltage power-off signal to output.
Evaporator temperature control unit obtains target evaporator temperature from leaving air temp control module, obtains ignition signal from key bus, receives user input signal, also obtain current evaporator temperature from evaporator temperature sensor from user's inputting interface (HMI).Evaporator temperature control unit, according to the above-mentioned signal received, controls compressor by exporting restriction unit.Especially, evaporator temperature control module adopts pid control algorithm to carry out output to compressor according to the current evaporator temperature of target evaporator temperature and actual feedback and controls, thus accurately control evaporator temperature control, guarantee the stability that air-conditioning system is freezed and energy-conservation performance.
Export restriction unit to be mainly used in, under various compressor exports the operating mode limited, in order to ensure the security of automobile, limiting the output valve of electric control valve for compressor.Compared with fixed displacement compressor, the output restriction unit of variable compressor control module is mainly different in refrigerant pressure restriction with the protection of evaporimeter antifrost.
In refrigerant pressure restriction, as shown in Figure 8, refrigerant pressure is recorded by the pressure sensor of refrigerant high pressure detecting unit, when refrigerant pressure is less than the first preset pressure p1(such as 2bar) bar(bar, 1bar=0.1 MPa=100 kPa=1.0197 kg/cm) time, compressor is closed.If refrigerant pressure rises to the second preset pressure p2 bar(such as 3bar from the first preset pressure p1) more than time, and (such as air-conditioning switch is opened to meet other on-conditions, the outer temperature of car is greater than 2 DEG C and waits compressors can condition of work) time compressor be switched on, and output limit value is 100%, that is, the output of evaporator temperature control unit is not limited.And when refrigerant pressure is at the 3rd preset pressure p3(such as 25bar) to the 4th preset pressure p4(such as 30bar) between time, export limit value to be closed to compressor during 0 %(0 % from 100% by linear regulation), also namely the operating current of electric control valve for compressor by Serial regulation to 0.Wherein p4>p3>p2>p1.This refrigerant pressure restriction method mainly for preventing refrigeration system when lack of refrigerant also in work, and in the protection of high-pressure side in order to prevent the hypertonia of refrigerating circuit, has the risk of pipelines from bursting or device damage when low-voltage variation.This scheme fully utilizes the characteristic that outer control variable displacement compressor discharge capacity is adjustable; pre-protection zone is added when high-pressure side; namely the method first reducing compressor displacement is adopted to protect when hypertonia, the high frequent switch that the mode that effectively prevent the direct switch of traditional overvoltage is brought.
In the protection of evaporimeter antifrost, for avoiding evaporimeter frosting when temperature is too low, devise the antifrost function of evaporimeter.Export adjustable characteristic for variable compressor, be provided with pre-protection zone.Concrete, as shown in Figure 9, current evaporator temperature is less than the first preset temperature t21(such as 0 DEG C) time, compressor is closed.If current evaporator temperature rises to the second preset temperature t22(such as 2 DEG C from the first preset temperature t21) time; and meet other on-conditions (such as air-conditioning switch, pressure protect; the on-conditions such as the outer temperature of car) time compressor be switched on; and output limit value is predetermined minimum value (Min Value), this region is switch region.If current evaporator temperature rises to the 3rd preset temperature t23(such as 5 DEG C gradually from the second preset temperature t22), then export limit value and rise to 100% from predetermined minimum value, this region is pre-protection zone.If current evaporator temperature is greater than the 3rd preset temperature t23, then the refrigerating capacity of compressor maintains 100%.So, evaporimeter frosting when temperature is too low can effectively be avoided.
Be described above the course of work of formant in compressor control module, will introduce the control method of compressor control module in detail below, as shown in Figure 10, this control method comprises the steps.
Step S201, judges whether evaporator temperature sensor normally works, if abnormal, performs step S202, otherwise performs step S203.
Step S202, the control electric current of setting electric control valve for compressor is fixed value p4, then performs step S209.
Step S203, evaporator temperature control unit adopts pid control algorithm to carry out FEEDBACK CONTROL to compressor, obtains the control current value p1 of electric control valve for compressor.
Step S204, judges whether evaporimeter has frosting risk, if there is frosting risk, such as, when evaporator temperature is less than the first preset temperature t21, perform step S205, no person performs step S206.
Step S205, utilizes output to limit unit and compressor output is limited, obtain the control current value p2 of electric control valve for compressor, then perform step S206.
Step S206, judges whether pressure qualifications meets, and perform step S207 if do not met, no person performs step S208.
Step S207, utilizes output to limit unit and compressor output is limited, obtain the control current value P3 of electric control valve for compressor, then perform step S208.
Step S208, calculates the final controlling value of electric control valve for compressor, and when only obtaining controlling current value p1, final controlling value is P1, when obtaining controlling current value p1 and p2, or p1 and p3, or during p1 and p2 and p3, final controlling value is minimum of a value wherein.Then step S209 is performed.
Step S209, judges that whether engine speed signal is normal, if normal (as be less than 500 rpm or be greater than 10000rpm), performs step S210, otherwise perform step S211.
Step S210, tables look-up and obtains compressor torque output valve, because the method is very conventional, do not repeat them here.
Step S211, close compressor, torque output is set as 0.
Control like this, can meet outer control variable displacement compressor Energy Saving Control demand, makes the performance of variable compressor obtain maximum performance.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. the energy-saving control device of a variable displacement compressor of air conditioner, it comprises interior temperature control module, leaving air temp control module and compressor control module, described interior temperature control module is at least according to the target leaving air temp of air-conditioning design temperature and the inside and outside temperature computation air-conditioning of car, described compressor control module controls described variable compressor according to described target evaporator temperature, it is characterized in that, described leaving air temp control module comprises:
Basic value computing unit, it obtains according to described target leaving air temp and the outer temperature of car the desired value that is less than described target leaving air temp;
Dynamic value computing unit, it determines the first offset according to the temperature difference of air-conditioning design temperature and vehicle interior temperature; There is defined the first default temperature difference and second being respectively positive number and negative and preset the temperature difference, when the described temperature difference is greater than the first default temperature difference or is less than the second default temperature difference, the predesigned compensation value that first offset maintains a positive number or negative is respectively constant, when the described temperature difference from second preset the temperature difference be elevated to gradually first preset the temperature difference time, the first offset linearly increases to described positive predesigned compensation value from the predesigned compensation value of described negative along with the increase of the temperature difference; And
Target evaporator temperature computing unit, it is sued for peace to described desired value and the first offset to obtain the target evaporator temperature close to described target leaving air temp.
2. energy-saving control device according to claim 1, is characterized in that, described basic value computing unit obtains first object value according to the outer temperature of car, and obtains the second desired value according to described target leaving air temp; Described first object value, along with the rising of the outer temperature of car, changes in trapezoidal shape substantially; Described second desired value is the difference of target leaving air temp and the first adjusted value; Described desired value is the smaller value in first object value and the second desired value.
3. energy-saving control device according to claim 1, is characterized in that, described dynamic value computing unit also determines the second offset according to current sunlight strength; When sunlight strength is less than the second preset value, described second offset increases along with the increase of sunlight strength, and when described sunlight strength is more than or equal to the second preset value, described second offset is substantially constant; Described target evaporator temperature be described desired value, the first offset and the second offset and.
4. the energy-saving control device according to claim 1 or 2 or 3, it is characterized in that, described leaving air temp control module also comprises antifog Risk Calculation module, described antifog Risk Calculation unit is used for determining the 3rd offset according to wiper signal, when windscreen wiper signal is for leaving, the 3rd offset is a changeless negative; Described target evaporator temperature be described desired value, the first offset, the second offset and the 3rd offset and.
5. energy-saving control device according to claim 4, it is characterized in that, described antifog Risk Calculation unit is also for determining knot nebelwind danger according to the output signal of car humidity or antifog sensor, thus determine the 4th offset further, when tying nebelwind danger and being greater than default risk, export a changeless negative as the 4th offset; When tying nebelwind danger and being less than default risk, the 4th offset reduces along with the increase of knot nebelwind danger; Described target evaporator temperature be described desired value, the first offset, the second offset, the 3rd offset and the 4th offset and.
6. a control method for variable displacement compressor of air conditioner, is characterized in that, current as optional defrosting mode when judging, and when the outer temperature sensor of car is normal, performs following steps:
The desired value of target leaving air temp is less than according to target leaving air temp and the outer temperature computation one of car;
The temperature difference according to air-conditioning design temperature and vehicle interior temperature determines the first offset; There is defined the first default temperature difference and second being respectively positive number and negative and preset the temperature difference, when the described temperature difference is greater than the first default temperature difference or is less than the second default temperature difference, the predesigned compensation value that first offset maintains a positive number or negative is respectively constant, when the described temperature difference from second preset the temperature difference be elevated to gradually first preset the temperature difference time, the first offset linearly increases to described positive predesigned compensation value from the predesigned compensation value of described negative along with the increase of the temperature difference;
Described desired value and the first offset are sued for peace to obtain the target evaporator temperature close to described target leaving air temp;
According to described target evaporator temperature, described variable compressor is controlled, reach target evaporator temperature reposefully as early as possible to make the temperature of evaporimeter.
7. control method according to claim 6, is characterized in that, the method calculating described desired value is: obtain first object value according to the outer temperature of car, and obtain the second desired value according to described target leaving air temp; Described first object value, along with the rising of the outer temperature of car, changes in trapezoidal shape substantially; Described second desired value is the difference of target leaving air temp and the first adjusted value; Described desired value is the smaller value in first object value and the second desired value.
8. the control method according to claim 6 or 7, it is characterized in that, comprise step further: when sunlight strength sensor is normal, calculate the second offset according to sunlight strength, described target evaporator temperature is desired value, the first and second offset sums; When sunlight strength is less than the second preset value, described second offset increases along with the increase of sunlight strength, and when described sunlight strength is more than or equal to the second preset value, described second offset is substantially constant; Described target evaporator temperature be described desired value, the first offset and the second offset and; When sunlight strength sensor is abnormal, if sunlight strength is the first preset strength, and calculate described second offset by the first preset strength.
9. control method according to claim 8, is characterized in that, comprises the step determining the 3rd offset according to wiper signal further: when windscreen wiper signal is for leaving, and the 3rd offset is a changeless negative; Described target evaporator temperature be described desired value, the first offset, the second offset and the 3rd offset and.
10. control method according to claim 9, it is characterized in that, comprise further and determine to tie nebelwind danger according to the output signal of car humidity or antifog sensor and determine the step of the 4th offset according to knot nebelwind danger, when tying nebelwind danger and being greater than default risk, export a changeless negative as the 4th offset; When tying nebelwind danger and being less than default risk, the 4th offset reduces along with the increase of knot nebelwind danger; Described target evaporator temperature be described desired value, the first offset, the second offset, the 3rd offset and the 4th offset and.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210217458.3A CN102721154B (en) | 2012-06-28 | 2012-06-28 | Energy-saving control device and control method for variable displacement compressor of air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210217458.3A CN102721154B (en) | 2012-06-28 | 2012-06-28 | Energy-saving control device and control method for variable displacement compressor of air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102721154A CN102721154A (en) | 2012-10-10 |
| CN102721154B true CN102721154B (en) | 2015-05-27 |
Family
ID=46946984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210217458.3A Active CN102721154B (en) | 2012-06-28 | 2012-06-28 | Energy-saving control device and control method for variable displacement compressor of air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102721154B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103216916B (en) * | 2013-04-28 | 2016-09-28 | 惠州市德赛西威汽车电子股份有限公司 | A kind of vehicle air conditioner temperature compensation control system and control method thereof |
| CN103471204B (en) * | 2013-08-29 | 2016-04-06 | 惠州华阳通用电子有限公司 | The configurable automobile air conditioner control system of comfort level and control method |
| CN103486701B (en) * | 2013-09-03 | 2016-03-02 | 惠州市德赛西威汽车电子股份有限公司 | A kind of on-board air conditioner temperature-controlled process |
| CN104048385B (en) * | 2014-06-30 | 2017-02-01 | 惠州华阳通用电子有限公司 | Method and system for controlling automatic air conditioner of automobile |
| CN105627521B (en) * | 2016-02-03 | 2019-01-08 | 广州汽车集团股份有限公司 | Air conditioning control method, device, system and air-conditioner controller |
| CN109808445B (en) * | 2019-01-10 | 2022-05-03 | 奇瑞汽车股份有限公司 | Compressor rotating speed control method of vehicle-mounted air conditioner |
| CN110549824B (en) * | 2019-08-16 | 2023-02-14 | 延锋伟世通电子科技（上海）有限公司 | Control method of deep energy-saving external control variable displacement compressor |
| CN112976985B (en) * | 2019-12-12 | 2022-11-11 | 杭州三花研究院有限公司 | Control method and control device of automobile air conditioning system |
| CN111256253A (en) * | 2020-01-19 | 2020-06-09 | 珠海格力电器股份有限公司 | Refrigerant storage amount detection method, refrigerant storage amount detection device and air conditioner |
| CN111716990B (en) * | 2020-05-29 | 2021-11-30 | 东风汽车集团有限公司 | Double-temperature-zone automobile air conditioner control method and system and storage medium |
| CN111959233B (en) * | 2020-08-31 | 2023-05-16 | 芜湖云雀电子科技有限公司 | Cabin climate automatic control system of pure electric vehicle and control method thereof |
| CN112229115A (en) * | 2020-09-17 | 2021-01-15 | 武汉格罗夫氢能汽车有限公司 | Anti-frosting control method and system for fuel cell hydrogen energy automobile air conditioning system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1871140A (en) * | 2003-09-03 | 2006-11-29 | 汉拿空调株式会社 | Controlling method of air conditioning system for vehicles |
| CN101428544A (en) * | 2008-12-08 | 2009-05-13 | 奇瑞汽车股份有限公司 | Vehicle air conditioner control method and control method thereof |
| CN101910635A (en) * | 2007-12-26 | 2010-12-08 | 三电有限公司 | Capacity control system for variable capacity compressor |
| CN202013000U (en) * | 2010-12-09 | 2011-10-19 | 惠州市德赛西威汽车电子有限公司 | Controller for automobile air conditioner |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000255253A (en) * | 1999-03-04 | 2000-09-19 | Denso Corp | Air conditioning system |
| KR20040102883A (en) * | 2003-05-30 | 2004-12-08 | 한라공조주식회사 | Method for compensating inner temperature according to defrosting of full automatic temperature control system |
| JP2006249969A (en) * | 2005-03-09 | 2006-09-21 | Denso Corp | Controller for variable displacement compressor |
| JP4990339B2 (en) * | 2009-10-30 | 2012-08-01 | 三菱電機株式会社 | Refrigeration cycle equipment |
-
2012
- 2012-06-28 CN CN201210217458.3A patent/CN102721154B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1871140A (en) * | 2003-09-03 | 2006-11-29 | 汉拿空调株式会社 | Controlling method of air conditioning system for vehicles |
| CN101910635A (en) * | 2007-12-26 | 2010-12-08 | 三电有限公司 | Capacity control system for variable capacity compressor |
| CN101428544A (en) * | 2008-12-08 | 2009-05-13 | 奇瑞汽车股份有限公司 | Vehicle air conditioner control method and control method thereof |
| CN202013000U (en) * | 2010-12-09 | 2011-10-19 | 惠州市德赛西威汽车电子有限公司 | Controller for automobile air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102721154A (en) | 2012-10-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102721154B (en) | Energy-saving control device and control method for variable displacement compressor of air conditioner | |
| CN102720651B (en) | Control device and control method for variable-displacement compressor of air conditioner | |
| CN106904058B (en) | Control method and device for electronic expansion valve in heat pump air conditioning system | |
| CN106352635B (en) | The progress control method and device of air-conditioning compressor | |
| CA2962829C (en) | A method for operating a vapour compression system with a receiver | |
| CN109945454B (en) | Air conditioning system compressor control method, air conditioning controller and air conditioner | |
| EP2734798B1 (en) | Defrost for transcritical vapor compression system | |
| CN103017293B (en) | Energy-saving control method for variable-displacement compressor of air conditioner | |
| CN103673416A (en) | Control method for refrigerant flow quantity in automobile air conditioning system and automobile air conditioning system | |
| CN108626778B (en) | Control method of energy-saving variable-frequency heating heat pump | |
| CN104457071A (en) | Method for controlling electric compressor of heat pump system for an automotive vehicle | |
| CN107560063B (en) | The control method of low-temperature refrigeration air conditioner | |
| CN104729163A (en) | Air conditioning system and defrosting control method thereof | |
| EP3017982B1 (en) | Vehicular air conditioning device | |
| CN111271836A (en) | Control method and device, air conditioner and computer readable storage medium | |
| CN102401524A (en) | Control method of electronic expansion valve when convertible frequency airconditioner runs in manner of refrigeration | |
| CN113819570B (en) | Multi-connected air conditioning system high pressure calculation method and multi-connected air conditioning system | |
| CN110822545A (en) | Variable frequency air conditioning system and control method for low frequency operation thereof | |
| WO2017086343A1 (en) | Refrigeration cycle for vehicular air-conditioning device, and vehicle equipped therewith | |
| CN203823994U (en) | Air-conditioning system | |
| CN105202837A (en) | Multi-split air conditioning system and intermediate pressure control method thereof | |
| WO2020064368A1 (en) | A method for controlling a vapour compression system based on estimated flow | |
| JP2002061969A (en) | Controller of freezing cycle | |
| KR20120061467A (en) | Air conditioning system of vehicle and method for controlling temperature of evaperator using two parameters filtered through different process | |
| JP2012081888A (en) | Air conditioner control device for vehicle and control device for vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 516006 Guangdong province Huizhou Zhongkai hi tech Industrial Development Zone Pearl River Road No. 1 Patentee after: HUIZHOU DESAY SV AUTOMOTIVE CO., LTD. Address before: 516006 Guangdong province Huizhou Zhongkai hi tech Industrial Development Zone Pearl River Road No. 1 Patentee before: Huizhou Desay SV Auto. Electronics Co., Ltd. |